No abstract

Phosphine and hydrogen sulfide can form phosphide and sulfide films on the metallic frictional surface. The mineral salts formed by the decomposition of some compounds (e.g., Zn(H2P04)2) presumably may modify the frictional surface by a process similar to phosphatation. How to picture chemical modification of the frictional surface with organochlorophosphorus additives? The representative of this type of additives studied was dibutyl tricliloromethylphosphonate [16, 17]: CC13P0(0C4H9)2, n,r» 1.4610, di"> 1.2142. At elevated temperatures dibutyl trichloromethylphosphonate undergoes the following conversions. First of all, hydrocarbon radicals split off in two stages to form a-butylene and the respective trichloromethylphosphonic acids (see, for instance, [18]): CC13P(0CJI9)2 CC13P / OC4H9 o OC4H9 CCI3P